Rohwerder, M.; Stratmann, M.: Delamination of Polymer/metal Interfaces: On the Role of Electron Transfer Reactions at the Buried Interface. 209th Meeting of The Electrochemical Society, Denver, CO, USA (2006)
Rohwerder, M.: On the role of passive oxides at buried polymer/metal interfaces. The 9th International Symposium on the Passivation of Metals and Semiconductors, and the Properties of Thin Oxide Layers, Paris, France (2005)
Stempniewicz, M.; Rohwerder, M.; Marlow, F.: Release of dye molecules from mesostructured microparticles. 104th Bunsentagung, Frankfurt a. M., Germany (2005)
Rohwerder, M.: Delamination von polymeren Beschichtungen: Offene Fragen und neue Ansätze. 1. Korrosionsschutz-Symposium: Korrosionsschutz durch Beschichtungen in Theorie und Praxis, Schlosshotel Villa Rheinfels, St. Goar, Germany (2005)
Ehahoun, H.; Stratmann, M.; Rohwerder, M.: Kinetics of O2-reduction at model interfaces investigated with a scanning Kelvin Probe using an O2-insensitive Ag/AgCl/KCl – tip. ISE Annual Meeting, Thessaloniki, Greece (2004)
Rohwerder, M.; Hausbrand, R.; Stratmann, M.: The role of the electrode potential at the buried polymer/metal interface on electrochemically driven delamination: The case MgZn2. ISE Annual Meeting, Thessaloniki, Greece (2004)
Rohwerder, M.; Stratmann, M.: The effect of Oxygen Reduction on the Self-Assembly and Stability of Thiol Monolayer Films. 205th Meeting of the ECS, San Antonio, TX, USA (2004)
Frenznick, S.; Stratmann, M.; Rohwerder, M.: Galvanizing of Defined Model Samples: On the Road to a Fundamental Physical Understanding of Hot-Dip Galvanizing. GALVATECH, Chicago, USA (2004)
Rohwerder, M.; Hausbrand, R.; Stratmann, M.: Development of Zinc-Alloy Coatings with Inherent Delamination Stability for Organic Coatings. Galvatech '04, Chicago, IL, USA (2004)
Stratmann, M.; Hausbrand, R.; Rohwerder, M.; Wapner, C.; Grundmeier, G.: Surface Modification of Iron based Alloys for Improved Corrosion Resistance and Adhesion. 13th Asian Pacific Corrosion Control Conference, Corrosion Symposium in NIMS, Tsukuba, Japan (2003)
Hydrogen in aluminium can cause embrittlement and critical failure. However, the behaviour of hydrogen in aluminium was not yet understood. Scientists at the Max-Planck-Institut für Eisenforschung were able to locate hydrogen inside aluminium’s microstructure and designed strategies to trap the hydrogen atoms inside the microstructure. This can…
We will investigate the electrothermomechanical response of individual metallic nanowires as a function of microstructural interfaces from the growth processes. This will be accomplished using in situ SEM 4-point probe-based electrical resistivity measurements and 2-point probe-based impedance measurements, as a function of mechanical strain and…
This project aims to investigate the influence of grain boundaries on mechanical behavior at ultra-high strain rates and low temperatures. For this micropillar compressions on copper bi-crystals containing different grain boundaries will be performed.
Oxidation and corrosion of noble metals is a fundamental problem of crucial importance in the advancement of the long-term renewable energy concept strategy. In our group we use state-of-the-art electrochemical scanning flow cell (SFC) coupled with inductively coupled plasma mass spectrometer (ICP-MS) setup to address the problem.
For understanding the underlying hydrogen embrittlement mechanism in transformation-induced plasticity steels, the process of damage evolution in a model austenite/martensite dual-phase microstructure following hydrogenation was investigated through multi-scale electron channelling contrast imaging and in situ optical microscopy.
This project will aim at developing MEMS based nanoforce sensors with capacitive sensing capabilities. The nanoforce sensors will be further incorporated with in situ SEM and TEM small scale testing systems, for allowing simultaneous visualization of the deformation process during mechanical tests
Hydrogen induced embrittlement of metals is one of the long standing unresolved problems in Materials Science. A hierarchical multiscale approach is used to investigate the underlying atomistic mechanisms.
Hydrogen embrittlement affects high-strength ferrite/martensite dual-phase (DP) steels. The associated micromechanisms which lead to failure have not been fully clarified yet. Here we present a quantitative micromechanical analysis of the microstructural damage phenomena in a model DP steel in the presence of hydrogen.
Thermo-chemo-mechanical interactions due to thermally activated and/or mechanically induced processes govern the constitutive behaviour of metallic alloys during production and in service. Understanding these mechanisms and their influence on the material behaviour is of very high relevance for designing new alloys and corresponding…